登入選單

返回Google圖書搜尋

Experiments with a Counter-propeller

Everett Parker Lesley

出版	National Advisory Committee for Aeronautics, 1933
URL	http://books.google.com.hk/books?id=Y9ynHAAACAAJ&hl=&source=gbs_api

註釋

This note describes tests made at Stanford University on a four-blade fixed counter-propeller in combination with a two-blade rotating propeller. It is shown that the efficiency of the normal form, well-designed air propeller can be increased about two percent over the full working range by the addition of fixed counter-propeller blades.